Description

Metanilic Acid CAS NO 121-47-1 is a key organic intermediate, specifically an aminobenzenesulfonic acid, essential for the synthesis of azo dyes and pigments. Its primary value lies in its role as a diazo component, enabling the production of vibrant, colorfast dyes for textiles, leather, and paper. This compound is critically needed by manufacturers in the dye and pigment industry, as well as by research and development laboratories focusing on organic synthesis and specialty chemical production.

Application

• Azo Dye Synthesis: Serves as a crucial diazo component for manufacturing acid dyes, direct dyes, and reactive dyes used in textiles.
• Pigment Production: Used in the creation of organic pigments for inks, paints, and plastics.
• Chemical Intermediate: Acts as a building block in the synthesis of more complex sulfonated aromatic compounds.
• Research & Development: Employed in laboratory settings for organic synthesis and the development of new colorants.
• Leather Processing: Utilized in dyes for coloring leather goods.
• Paper Coloring: Applied in the production of dyes for specialty papers.

Basic Information

Item	Detail
Product Name	Metanilic Acid
CAS No.	121-47-1
Molecular Formula	C6H7NO3S
Molecular Weight	173.19 g/mol
Synonyms	3-Aminobenzenesulfonic acid; Metanilic Acid; Aniline-3-sulfonic acid; m-Aminobenzenesulfonic acid; 3-Sulfoaniline; Metanilsäure (German); Acide métanilique (French)
EINECS	204-473-6

Quality Control

Our Metanilic Acid is produced under a rigorous quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise chemical and physical specifications. A Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is available for every shipment to guarantee traceability and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Off-white to light brown crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.